Rotary stool



' (No Model.)

E.'N.TUTTLE.

ROTARY sTooL.

Patented July 19,1881.

I .flo r may;

UNITED STATES EDWIN N. TUTTLE,

PATENT OFFICE.`v

OF FITOHBURG, ASSIGNOR OF ONE-THIRDV TO ANNA M. TUT'ILE, OF LYNN, MASSACHUSETTS.

ROTARYiSTOOL.

SPECIFICATION forming part of Letters Patent No. 244,691, dated July 19, 1881.

Application filed February 28, 1881. (No model.) g

` tary stool, whether-made with a pivot or screw,

which shall'be strong and durable, more simple in construction, lighter in weight, and less liable to break or require repair than when made in the usual way.

The invention consists in the construction andcombination of a mechanism for holding the top ends of the stool-legs, and receiving the pivot and screw of the seat, as hereinafter fully described.l 4

Figure 1 is a sectional elevation of a stool embodying my invention, and shows the combination in detail. Fig. 2 is a plan of the base, comprising the legs A and cross-rounds B, as

arranged toreceive the cap C. Fig. 3 is a die-'f tached View ofthe spider wedge or casting G. Fig. 4 is a plan of the same. of the cap C. Fig. 6 is a section of the cap on line y y. Figs. 7 and 8 are sectional views of the cap C and the wedge G, showing modified means of combination.

A are the legs of the stool, which are connected together by rounds Bin the usual manner. The middleparts ofthe legs A are nearly vertical, and their upper parts are curved inward and upward to bring them into position (see Fig. 1) to receive the cap or case C, hereinafter described. The cap or case G, Fig. 5, is a thin plate of metal, irregular in form, with as many scallops D as the stool has legs. Upon the edge of this plate is a downward and slightly outwardprojecting ange F, and in the center is a hole, E, through which the top end of the spider-shaped casting G, hereinafter described, is made to pass. The dimensions of this cap can be varied according to the amount of curvature in the top part of the legs A. I make it so that, measured on Fig. 5 is a plan either of the dotted lines a' w, it is from two and a half to three inches, and I believe the best results are obtained with a cap of substantially these dimensions.

The spider-wedge G, Fig. 3, consists of a circular portion, H, a recessed portion, Land projecting ears J. On the outside of the circular portion H is cut a thread toreceive a nut, M,

as hereinafter described. The bottom part or base, I, is provided with as many recesses K and as many projecting ears J as the stool has legs A. Each recess K is concaved longitudinally, and from the bottom to the top it iuclines gradually inward. Extendinglongitudinally through the center of the casting or wedge G is a hole, L, inside of which a thread is cut upon the casting G to receive the screw attached to the stool-seat, ashereinafter de-V scribed. The dimensions of the casting or spider-wedge Gr should be determined with reference to the sizeof the cap O and the diameter of the stool-legs A.

In carrying out the objects of my invention, the legs A are bent into shape and connected by cross-rounds B, the whole beingv glued tol gether and the cap (l placed over the :top ends, as shownE in Fig. 2. rlhe wedge G is then heldV in one hand under the cap C and with its recesses K opposite to the legs A. It is then pushed upward till the top end thereof projects through the hole E. The ange-nut M is then screwed on and the wedge drawn upward, forcing the legs A outward into the sockets formed by the scallops D in the llange of the cap, (all as shown in Fig. 1,) and in this manner the legs A are securely wedged in between the cap C and wedge or casting Gr. The screw N of the seat O is now introduced into the hole L, as shown in Fig. 1. In case of a pivot attached to the seat O, the hole L extends in to but not quite through the casting Gr.

I am aware that the nut M maybe dispensed with and other means employed to draw the casting Gupward to the cap C and thdugh I prefer to use the nut M, still in- Fig. 7 ofthe accompanying drawings I have represented, in combination with the capv and casting G, two bolts, P P, which I have successfully used for said purpose. Another method still would beto make-the casting Gr in two parts, one part ul .I Y

consisting of the recessed portion I and another consisting of the circular portion H. 1f, noW,this portion His passed downward through the hole E so that the l-.rnge R, which is cast upon one end thereof, rests upon the top of the cap C, and the .bottom end thereof, provided with a thread, is screwed into a hole in the wedge or base portion I, the clamping effect is produced substantially as before described. Fig. 8 is :L sectional View, showing this combination in detail.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

l. The combination, in n stool, of legs, the

AEDWIN N. TUTTLE.

Witnesses:

CHRISTOPHER C. TUTTLE, JOHN POWERS. 

